package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.exception.SetmealEnableFailedException;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.mapper.dishMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.SetmealVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

@Service
public class SetmealServicelmpl implements SetmealService {
    @Autowired
    private SetmealMapper setmealMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    @Autowired
    private dishMapper dishMapper;
    /**
     * 新增套餐  同时需要保存套餐和菜品的关联关系
     * @param setmealDTO
     */
    @Override
    @Transactional
    public void add(SetmealDTO setmealDTO) {
        Setmeal setmeal=new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);
        //向套餐表插入数据
        setmealMapper.insert(setmeal);
        //获取生成的套餐id
        Long setmealId = setmeal.getId();
        //向套餐和菜品关系表中插入数据
        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
       setmealDishes.forEach(setmealDish -> {
           setmealDish.setSetmealId(setmealId);
       });
        setmealDishMapper.insert(setmealDishes);
    }

    /**
     * 分页查询
     * @param setmealPageQueryDTO
     * @return
     */
    @Override
    public PageResult selectPage(SetmealPageQueryDTO setmealPageQueryDTO) {
        PageHelper.startPage(setmealPageQueryDTO.getPage(),setmealPageQueryDTO.getPageSize());
        Page<SetmealVO> page=setmealMapper.selectPage(setmealPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }

    /**
     * 根据id查询
     * @param id
     * @return
     */
    @Override
    public SetmealVO selectId(Long id) {
        //先查询套餐表
      Setmeal setmeal=  setmealMapper.selectId(id);
      //查询套餐菜品关系表
        List<SetmealDish> setmealDishes=setmealDishMapper.selectId(id);
        //封装
        SetmealVO setmealVO=new SetmealVO();
        BeanUtils.copyProperties(setmeal,setmealVO);
        setmealVO.setSetmealDishes(setmealDishes);
        return setmealVO;
    }

    /**
     * 修改套餐
     * @param setmealDTO
     */
    @Override
    @Transactional
    public void update(SetmealDTO setmealDTO) {
        Setmeal setmeal=new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);
        //修改套餐表
        setmealMapper.update(setmeal);
        //删除套餐和菜品的关系
        setmealDishMapper.delete(setmealDTO.getId());
        //重新插入前端传过来的数据
        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        setmealDishes.forEach(setmealDish -> {
            setmealDish.setSetmealId(setmealDTO.getId());
        });
        setmealDishMapper.insert(setmealDishes);
    }

    /**
     * 批量删除套餐
     * @param ids
     */
    @Override
    public void delete(List<Long> ids) {
        //起售中的套餐不能删除
        ids.forEach(id->{
            Setmeal setmeal = setmealMapper.selectId(id);
            if(setmeal.getStatus()== StatusConstant.ENABLE){
                throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
            }
        });
        //删除套餐表
        setmealMapper.delete(ids);
        //删除套餐和菜品的关系
        setmealDishMapper.deletepiliang(ids);
    }

    /**
     * 套餐起售、停售
     * @param id
     */
    @Override
    public void startOrStop(Integer status,Long id) {
        //起售套餐时，判断套餐内是否有停售菜品，有停售菜品提示"套餐内包含未启售菜品，无法启售"
        if(status==StatusConstant.ENABLE){
            //先判断套餐里是否有菜品
            //select dish.* from dish left join setmeal_dish on dish.id=setmeal_dish.dish_id where setmeal_dish.setmeal_id=?
            List<Dish> dishList =  dishMapper.getBySetmealId(id);
            if(dishList!=null && dishList.size()>0){
                dishList.forEach(dish->{
                    if(dish.getStatus()==StatusConstant.DISABLE){
                        throw new SetmealEnableFailedException(MessageConstant.SETMEAL_ENABLE_FAILED);
                    }
                });
            }
        }

     Setmeal setmeal=new Setmeal();
        setmeal.setId(id);
        setmeal.setStatus(status);
        setmealMapper.update(setmeal);
    }

    /**
     * 根据套餐id查询包含的菜品列表
     * @param id
     * @return
     */
    @Override
    public List<DishItemVO> getDishItemById(Long id) {
        return setmealMapper.getDishItemBySetmealId(id);

    }

    /**
     * 根据分类id查询套餐
     * @param setmeal
     * @return
     */
    @Override
    public List<Setmeal> list(Setmeal setmeal) {
        List<Setmeal> list = setmealMapper.list(setmeal);
        return list;
    }

}
